Burglar alarm



Mar. 20, 1923. 1,448,780. N. D. WELLS.

BURGLAR ALARM. FILED JAN.2|. 1922.

Patented ar. 20, 11923.

NELSON D. WELLS, 0F DAYTON, OHIO.

BURGLAR ALARM.

Application filed .lannaryQl, 1922. SeriaLNo. 530,957.

To allot) 7110721425 may concern: 1

Be it known that I, 'iNnLson D. WnL s, a citizen of the United States,residing at Dayton, in the county of Montgomery and State of @hio, haveinvented certainnew and useful improvements in Burglar Alarms, of whichthei -following is a specification.

lheprincipal object of my inventionis to provide a simple andefficientburglar. alarm thatmay be used in a building or an automobileto sound an alarm when a thief seeks to gain entrance thereto. 1 Myimproved burglar alarm is portable, and maybe easily placed in apositionfor operation by adoor or other movable-object. y

In the accompanying drawings, Figure 1 is a side elevational view of myimproved burglar alarm in its closed position. Figure 2 is atop planview of the same with the lid removed. Figure 3 is front end View of thedevice, partly broken away to reveal the ratchet and cartridge-holdingmechanism. Figure 4 is a longitudinal, sectional view taken through thedevice showing the cartridge dischargingmeans. And Figure 5 is asideview of a door, showing my device in a position tobe operatedbythe'lrnob thereof. 1 7

Throughout the specification and drawings, similar'referen ce charactersdenote corresponding parts.

Referring to the accompanying drawings for a detailed description of thepreferred form of embodiment of my invention, the

numeral 1 designates a trough-shaped metallic shell or casing to whichthere is hingedly secured a cover 2. Pivotally secured by a screw 3 toone side of the cover 2, is a hook 4E whose free end is adapted toengage a screw 5 secured to the casing 1, to firmly lock the coverthereto. (See Figure 1.)

Secured by means of screws 6, 6 within the metal casing 1, is anelongated cylindrical member 7 containing a side recess 8 in its frontend to receive a cylinder 9. The latter contains axial holes 10 adaptedto reeeive blank cartridges 11 which. are exploded b means hereinafterto be described. (See Figures 2, 3 and 4.) I

The cartridge holding cylinder 9fis fixedly secured on a rod 12 whosefront end received by a hole in the head portion 13 of the cylindricalmember7. Immediately behind the cartridge holder 9 there is an enlargedportion. 14; of the cylindrical member 7, through a hole inwhich thefront end ofthe rod l2.also.passes,the rear end of said rod projectingthroughfa hole in the rear wall 15 of the casing 1. Fixedly .se curedtothe rear endof the rod 12 is a finger-grip element 16 by means of whichthe rod maybe rotatedtoturn the cartridge holder 9. (See l'iigures 1 and2.) v

Provided in the front wall 17 ofthe metal a hole 19 in the head portion13 of the elongatedcylindrical member '7. The hole 19 is so located thatits center will be on substantially (the same circumference as thecasing 1 isa hole 18 that communicates with centers of the holes 10inthe cartridge holder '9. so that when the latter is rotated, the

cartridges 1'1 contained in the latter holes may be successively broughtbehind the hole 18 for explosion. (See Figurel.)

. Provided in theperiphery of;the cartridge holder 9 are transversenotches 20, one for each holelltl. These notches ,are spaced apart adistance correspondingtto that which exists between each two of theholes 10.

Secured to :one side of the cylindrical member .7 by means of a :screw21,

isa flat spring pawl 22whose nose portion is adapted to engagethenotches 20 .in the periphery of thecartridge holder, 9 to after ithas been turned forward one notch. hen the cartridge holder 9 hasbeenturned clockwise one notch by the .rod 12, it will bring one of thecartridges 11 13013130316011 directly behind the hole 19 whereit will beheld bythe pawl22 until it .is exploded by the means now to bedescribed.

' The.cylindrical'member'? contains a longitudinal bore in which there.is movable a striker-rod 23 liavingachisel shaped'front end 2% adaptedto engage andiexplode the cartridge. Just behind its striking end .24,

the rod 23 has an annular shoulder portion prevent a rearward movementof the latter the casing.

mates in an offset portion 29 by means of Provided in the rear topportion of the front side of the casing 1, is an elongated notch throughwhich the offsetportion 29 of the rod 23 is free to be moved rearwardlyto a concave recess near the rear wall 15 of Into this recess the offsetend 29 of-the rod 23 is adapted to be turned, to

hold the rod in its spring-compressing position, the cartridge holder 9is free to be rotated by the rod 12 to bring an unexploded cartridge 11into a position to be engaged by the striker end 24 of the rod 23. Inoperation, the offset end 29 of the rod 23 may be drawn out of theconcave recess at the end of the notch 30 by numerous means, among whichis the one now to be described. Referring to Figure 5, the numeral 31designates a door to the knob 32 of which there is applied a grippingband 33 to which there is secured a horizontal turning member 34. Toeach end of the latter there is connected the free end of a string 35which, at its lower middle portion, is secured to the offset end 29 ofthe rod 23 of a burglar alarm placed on the floor near said door. Now,when the knob 34 is turned, one end of the horizontal member 34 will beelevated to pull the offset end 29 of the rod 23 out of the recess atthe endof the notch 30, whereupon the compressed spring 28 will be freeto force the front end 24 of said rod against the cartridge 11 withsufficient violence to discharge it. (See dotted lines in Figure 4.) Thesound resulting from the explosion of this cartridge will be suflicientto apprise persons in the vicinity, of the attempt of a thief to enterthe building or automobile in which the device is placed.

After a cartridge has been exploded by it, the rod 23may be drawn backby its offset portion 29 to the recess which receives it.

The cartridge holder 9 is then free to be turned by the rod 12 to bringan unexploded cartridge in direct line with the hole 19 and thelongituudinal bore in the cylindrical member 7 for explosion by thefront end of the rod 23 when its offset end 29 is again disengaged fromsaid recess.

latter into violent engagement with a cartridge in said holder toexplode the same, and means forholding said striker rod in its outermostposition to permit the cartridge holder to be rotated by the first rodto bring an unexploded cartridge to a position to be engaged by thefront end of the striker rod. i

2. In a device of the type described, the combination with a casing, ofa cylindrical member mounted therein containing a longitudinal bore andhaving a recess in its front portion, an operating rod rotatably mountedin said casing, a cartridge holder fixedly secured to said rod forrotation in said recess, said cartridge holder having a series of axialcartridge-receiving holes, each one of which is adapted to besuccessively brought in direct line with the longitudinal bore in thecylindrical member to position a cartridge in front of said bore, astriker rod slidable in said bore, a shoulder on said striker rod, aspring encircling said rod between said shoulder and the rear end of thecylindrical member, adapted to be compressed by the outward movement ofthe strikerrod to force the front end of the latter into violentengagement with a cartridge in said holder to explode the same, andmeans for holding said striker rod in its outermostposition to permitthe cartridge holder to be rotated by the first rod to bring anunexploded cartridge to a position to be engaged by the front end of thestriker rod.

I 3. 1 n a device of the type described, the combination with a casing,of a cylindrical member mounted therein containing a longitudinal boreand having a recess in its front portion, an operating rod rotatablymounted in said casing,"a cartridge holder fixedly,

secured to said rod for rotation in said recess, said cartridge holderhaving a series of axial cartridge-receiving holes, each one of which isadapted to be successively brought in direct line with the longitudinalbore in the cylindrical member to position a cartridge in front of saidbore, a striker rod slidable in said bore, means for forcing saidstriker rod into violent engagement with a cartridge in said holder toexplode it, said cartridge holder having transverse notches in itsperiphery, and a spring pawl secured to said cylindrical member behindits recessed portion to engage the notches in the periphery of thecartridgeholder, to prevent a counter movement of the latter after ithas been turnedby the operating rod to bring an unexploded cartridge infront of the striker rod.

4. In a device of the type described, the combination with atrough-shaped casing, of an elongated cylindrical member mounted thereincontaining a longitudinal bore and having a recess in its front portion,an operating rod rotatably mountedin said oasing at the side of thecylindrical member, a cartridge holder fixedly secured to said rod forrotation in said recess, said cartridge holder having a series ofaxialcartridgereceiving holes, each one of Which is adapted to besuccessively brought in direct line With the longitudinal bore in thecylindrical said rod between said shoulder and the rear 'end of thecylindrical member, adapted to be compressed by the outward movement ofvsaid Wall having a recess at the end of said notch toreceive the offsetrear end of the striker rod to hold it in its outermost posi-,

tion, whereby the cartridge holder may be rotated by the operating rodto bring an unexploded cartridge to a position to be engaged by thestriker rod when its offset end is forced out of the recess at the endof said notch.

In testimony whereof I have hereunto set my hand this 20th day ofJanuary, 1922.

NELSON D. WELLS. Witness:

HOWARD S. SMITH.

